获取元素位置

<template>
	<div><div id='editWorkFlow' @contextmenu.prevent.stop="handleClick">
	</div>
	<div v-show="showContextMenu" ref="contextMenuRef" class="contextMenu"> </div></div>
</template>

const handleClick = function({clientX, clientY}) {
  contextMenuRef.value.style.left = clientX - document.getElementById('editWorkFlow').getBoundingClientRect().left + 'px'
  contextMenuRef.value.style.top = clientY - document.getElementById('editWorkFlow').getBoundingClientRect().top + 'px'
}